Jason (jcreed) wrote,
Jason
jcreed

It always bothered me that I could never convince myself that Perlin noise was actually isotropic,
So here's what you get if, for each cell in a grid, you sample n from the Poisson distribution, and put in n circular splotches of value, where the center of the circle is uniformly distributed in that square grid cell.

And then do that all over again for various sizes of grid and circle.

Since the Poisson process is isotropic, and the distribution of number of events in each region is Poisson-distributed and independent from all other regions, the result is 100% definitely isotropic.

http://jcreed.org/js/roads/continents.html
Tags: maps
Subscribe

  • (no subject)

    Some further progress cleaning up the https://xkcd.com/1360/ -esque augean stables that is my hard drive. Tomato chicken I made a couple days ago…

  • (no subject)

    Did some personal archaeology. Helped a little with laundry. Threw some chicken, onions, tomato, stock, peppers in the slow cooker and hopefully…

  • (no subject)

    Dinner with akiva and dannel at nuevo portal in carroll gardens. Ate a pile of chicken stew and rice and beans and maduros, good times. I do miss…

  • Post a new comment

    Error

    Anonymous comments are disabled in this journal

    default userpic

    Your reply will be screened

    Your IP address will be recorded 

  • 0 comments